package com.trw.trp.database;

import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.util.Map;
import java.util.Properties;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

import com.utuan.log.Log;
import com.utuan.log.LogFactory;

public class ConnectionPool {

	private static Log log = LogFactory.getLog(ConnectionPool.class);

	private static DataSource dataSource;

	static {

		try {
			InitialContext cxt = new InitialContext();
			dataSource = (DataSource) cxt.lookup("java:/comp/env/jdbc/trp");
			if (dataSource == null) {
				log.warn("Data source not found!");
			}
		} catch (NamingException e) {
			log.warn(e);
		}

	}

	public static Connection getConnection() throws SQLException {
		Connection conn = dataSource.getConnection();
		if (conn != null) {
			conn.setAutoCommit(false);
		}
		return conn;
	}

	public static void releaseConnection(Connection conn) {
		try {
			conn.close();
		} catch (SQLException e) {
			log.warn(e);
		}
	}

	static class DBConnection implements Connection {
		Connection conn;

		DBConnection(Connection conn) {
			this.conn = conn;
		}

		public <T> T unwrap(Class<T> iface) throws SQLException {
			return conn.unwrap(iface);
		}

		public boolean isWrapperFor(Class<?> iface) throws SQLException {
			return conn.isWrapperFor(iface);
		}

		public void clearWarnings() throws SQLException {
			conn.clearWarnings();
		}

		public void close() throws SQLException {
		}

		public void commit() throws SQLException {
			conn.commit();
		}

		public Statement createStatement() throws SQLException {
			return conn.createStatement();
		}

		public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
			return conn.createStatement(resultSetType, resultSetConcurrency);
		}

		public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
				throws SQLException {
			return conn.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
		}

		public boolean getAutoCommit() throws SQLException {
			return conn.getAutoCommit();
		}

		public String getCatalog() throws SQLException {
			return conn.getCatalog();
		}

		public int getHoldability() throws SQLException {
			return conn.getHoldability();
		}

		public DatabaseMetaData getMetaData() throws SQLException {
			return conn.getMetaData();
		}

		public int getTransactionIsolation() throws SQLException {
			return conn.getTransactionIsolation();
		}

		public Map<String, Class<?>> getTypeMap() throws SQLException {
			return conn.getTypeMap();
		}

		public SQLWarning getWarnings() throws SQLException {
			return conn.getWarnings();
		}

		public boolean isClosed() throws SQLException {
			return conn.isClosed();
		}

		public boolean isReadOnly() throws SQLException {
			return conn.isReadOnly();
		}

		public String nativeSQL(String sql) throws SQLException {
			return conn.nativeSQL(sql);
		}

		public CallableStatement prepareCall(String sql) throws SQLException {
			return conn.prepareCall(sql);
		}

		public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency)
				throws SQLException {
			return conn.prepareCall(sql, resultSetType, resultSetConcurrency);
		}

		public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
				int resultSetHoldability) throws SQLException {
			return conn.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
		}

		public PreparedStatement prepareStatement(String sql) throws SQLException {
			return conn.prepareStatement(sql);
		}

		public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
			return conn.prepareStatement(sql, autoGeneratedKeys);
		}

		public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
			return conn.prepareStatement(sql, columnIndexes);
		}

		public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
				throws SQLException {
			return conn.prepareStatement(sql, resultSetType, resultSetConcurrency);
		}

		public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency,
				int resultSetHoldability) throws SQLException {
			return conn.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
		}

		public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
			return conn.prepareStatement(sql, columnNames);
		}

		public void releaseSavepoint(Savepoint savepoint) throws SQLException {
			conn.releaseSavepoint(savepoint);
		}

		public void rollback() throws SQLException {
			conn.rollback();

		}

		public void rollback(Savepoint savepoint) throws SQLException {
			conn.rollback(savepoint);

		}

		public void setAutoCommit(boolean autoCommit) throws SQLException {
			conn.setAutoCommit(autoCommit);
		}

		public void setCatalog(String catalog) throws SQLException {
			conn.setCatalog(catalog);
		}

		public void setHoldability(int holdability) throws SQLException {
			conn.setHoldability(holdability);
		}

		public void setReadOnly(boolean readOnly) throws SQLException {
			conn.setReadOnly(readOnly);
		}

		public Savepoint setSavepoint() throws SQLException {
			return conn.setSavepoint();
		}

		public Savepoint setSavepoint(String name) throws SQLException {
			return conn.setSavepoint(name);
		}

		public void setTransactionIsolation(int level) throws SQLException {
			conn.setTransactionIsolation(level);
		}

		public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
			conn.setTypeMap(map);
		}

		public Clob createClob() throws SQLException {
			return conn.createClob();
		}

		public Blob createBlob() throws SQLException {
			return conn.createBlob();
		}

		public NClob createNClob() throws SQLException {
			return conn.createNClob();
		}

		public SQLXML createSQLXML() throws SQLException {
			return conn.createSQLXML();
		}

		public boolean isValid(int timeout) throws SQLException {
			return conn.isValid(timeout);
		}

		public void setClientInfo(String name, String value) throws SQLClientInfoException {
			conn.setClientInfo(name, value);
		}

		public void setClientInfo(Properties properties) throws SQLClientInfoException {
			conn.setClientInfo(properties);
		}

		public String getClientInfo(String name) throws SQLException {
			return conn.getClientInfo(name);
		}

		public Properties getClientInfo() throws SQLException {
			return conn.getClientInfo();
		}

		public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
			return conn.createArrayOf(typeName, elements);
		}

		public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
			return conn.createStruct(typeName, attributes);
		}
	}

}
